Jerry Fodor and Massimo Piattelli-Palmarini, in What Darwin Got Wrong come at neo-Darwinism from a number of directions. Initially, they draw a comparison with B.F. Skinners psychological theory of operant conditioning, which attempted to explain changes in human behavior by patterns of stimulus and response. Limitations of that theory have eventually been revealed: it did not take into account internal mechanisms in organisms subjected to external stimuli; and the intention of researchers or subjects affected the results of experiments. Skinners behaviorism can be corrected by taking these aspects into account. But no such correction is possible in neo-Darwinism, which has no interest in the internal organization of creatures . . . (genotypic and ontogenetic structures) and recognizes no intentions in evolutionary processes.